Christian - Welcome to the board. Nice looking scoot. Vespas are cool, but you have to have the right sunglasses and look to get away with it. If it's right, "the chicks dig it." If you look like PeeWee Herman, they don't. Lived in Italy for a while, and the kids on Vespas were either the most brave or most stupid people I've ever seen . . . zipping in and out of traffic.
Good luck finding a nice GTV like you want. Expect to pay good money for one, however. A nice driver with a good straight rust-free body is going to set you back $7-9K. Look under the heading "Anything about Alfas" and the "Advice to new owner's" thread. You will find many of the standard reference books on Alfas.